Disaster Toronto Zoo’s 2-year-old Masai giraffe dies during castration procedure - Veterinarians say that the risky surgical intervention carries a mortality rate of 41%

Toronto Zoo’s 2-year-old Masai giraffe dies during castration procedure (archive) (backup)
Fewer than 35,000 Masai giraffes survive in the wild today, having experienced more than a 50-percent decline in the past 30 years.

By Ilyas Hussein
Published: July 25th, 2024 at 11:50 AM UTC


matu and mstari.jpg

Three-week-old Matu snuggles his mother Mstari in Toronto on March 11, 2022. The Toronto Zoo said it had been
carefully planning this operation for months and was aware of the risks of the animal going under anesthesia.

A two-year-old Masai giraffe named Matumaini died while under anesthesia during a surgical operation at the Toronto Zoo on Thursday.

Matumaini, also known as Matu, was undergoing a castration procedure when he stopped breathing.

“I’ve been doing this job for about 20 years now and every so often, really, really bad things happen,” Nic Masters, the director of wildlife health at the zoo, told the Star. “This is one of them.”

Masai giraffes are considered endangered species as fewer than 35,000 survive in the wild, according to the zoo — representing a 50-percent decline in the past 30 years. Masters said the zoo had been carefully planning this operation for months in consultation with the Species Survival Plan Program, which manages Masai giraffes across North America to ensure the population is healthy and genetically stable. The team decided that keeping Matu at the Toronto Zoo, alongside his family group, would be best for his wellbeing. However, since Matu was going to be fertile very soon, they wanted to ensure he couldn’t breed with his mother or sister, who are also at the Toronto Zoo, by castrating him.

“We want to keep herd animals like giraffe in relatively large groups when we possibly can, and we’ve got the space to do that here,” Masters said. “Part of the thinking behind it was that we would maintain a bigger social group, so better welfare for them in that bigger social group.”

The zoo said in its statement that it was aware of the risks of the animal going under anesthesia, especially with large vertebrates. Masters said that some of Matu’s genetic material has been collected by the zoo’s reproductive science team and will be housed in their biobank. “While Matu is no longer with us, his contribution to the survival of his species can live on for future generations of Masai giraffes in managed populations,” the zoo said.

Matu was born at the zoo in February 2022. He leaves behind his older sister Amani, born in May 2020, mother Mstari and father Kiko at the Toronto Zoo. Before his passing, Masters described Matu as a “brilliant,” “inquisitive” and “playful” giraffe, who loved to explore. In October, he broke his toe on his hind left foot. During his treatment, Masters praised his attitude when he was entering the care of wildlife care keepers. “He was a really great individual,” Masters said.

Matumaini originates from the word “hope” in Swahili, a language commonly spoken in Kenya and Tanzania, where Masai giraffes are originally found. A necropsy will be conducted to determine his cause of death. The zoo said it will provide staff with access to grief counselling services.

“It’s a tragic loss,” Masters said.
 
The zoo said in its statement that it was aware of the risks of the animal going under anesthesia, especially with large vertebrates. Masters said that some of Matu’s genetic material has been collected by the zoo’s reproductive science team and will be housed in their biobank. “While Matu is no longer with us, his contribution to the survival of his species can live on for future generations of Masai giraffes in managed populations,” the zoo said.
I've never really castrated an animal before but general anesthesia for it strikes me as unusual. Thought the general process these days (at least for goats and stuff) was to cut off bloodflow with a tight elastic then snip the balls when they're good and numb/before they go gangrenous.
 
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Wait, we are castrating endangered species? How does this make any sense when… Oh, Canada.
Probably because uncastrated male giraffes are a pain in the ass to deal with. It did say that they saved this giraffe's sperm to increase the genetic diversity of the species. Although I dunno why you'd want to use it since this giraffe had shitty genes that he couldn't survive being castrated.
 
This seems like it should be at least three or four plans down the list of ways to prevent giraffe incest. Maybe a fence was in order.
...Too lazy to build a fence. Fuck it, cut off his balls! Fuck, I'm certain laziness is also one of the motivations to troon out... only to find out the price exacted was heavier than the cost of the effort.

>Too lazy to get a girlfriend. Fuck it, I'll cut off my balls and be the girlfriend!
 
Wait, we are castrating endangered species? How does this make any sense when… Oh, Canada.
Cuz I'm sure putting several male giraffes in a small enclosure won't lead to them beating the fuck out of each other or anything.
I've never really castrated an animal before but general anesthesia for it strikes me as unusual. Thought the general process these days (at least for goats and stuff) was to cut off bloodflow with a tight elastic then snip the balls when they're good and numb/before they go gangrenous.
Depends on the animal, not all critters have ball sacks, pigs for example have internal balls that you have to cut the taint area, pop them out, then cut them off. I'm guessing giraffes have a similar setup.
 
Couldn't they just move him to a zoo with female giraffes for him to fuck?
Looked into this. This article says he couldn't be moved to another facility because he was still recovering from a toe fracture he sustained in October last year. It seems like it was a pretty severe injury, possibly crippling; it got infected at one point, and they had to retrofit him with a specially-built CAM boot because half of the hoof fell off.
I've never really castrated an animal before but general anesthesia for it strikes me as unusual. Thought the general process these days (at least for goats and stuff) was to cut off bloodflow with a tight elastic then snip the balls when they're good and numb/before they go gangrenous.
What @Ibanez RG 350EX said, (Okay, I guess his post got deleted? tl;dr giraffes are huge, even the babies, which makes them much harder to castrate than regular livestock) but giraffes are also incredibly dangerous animals if they get pissed off. If an adult giraffe decides to kick your fragile human head, it's not going to stay on your shoulders.



From a pure financial/legal standpoint, sedating it is the only real option. You do not want to deal with the insurance companies, you do not want to deal with litigation, and you do not want to deal with the horrible PR that would come with a giraffe decapitating one of your employees because you wanted to eunuchize it.

It did say that they saved this giraffe's sperm to increase the genetic diversity of the species. Although I dunno why you'd want to use it since this giraffe had shitty genes that he couldn't survive being castrated.
That, and he had already tried to rape his mother once before, apparently? I don't think his dysgenic giraffe spunk should be anywhere near a bullfriend-free girl after that.
 
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I've never really castrated an animal before but general anesthesia for it strikes me as unusual. Thought the general process these days (at least for goats and stuff) was to cut off bloodflow with a tight elastic then snip the balls when they're good and numb/before they go gangrenous.
Many moons ago when I was first assist for a veterinary office, we used general anesthesia on every spay and neuter. Large livestock operations may due to the large volume of steer needed, but veterinarians don't neuter via elastration; they make a sagittal incision in the scrotum and pull the testes out.
 
Wait, we are castrating endangered species? How does this make any sense when… Oh, Canada.

I looks like he wasn't a good candidate for relocation and they didn't want him breeding with the fam. They need to keep these populations genetically diverse because the species is endangered.

Maybe next time they should just move the giraffes to another zoo or do a trade to spread around the genes. I don't know a lot about giraffes but maybe separating them can be akin to separating an elephant herd and this one was too bonded to his current herd.
 
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The Toronto Zoo has released a statement on Facebook (archive) about Matumaini's death. Pasting it here, because they figured out the cause of death:
"The last 24 hours has been incredibly difficult at your Toronto Zoo following the sudden passing of Matumaini (Matu), the 2-year-old Masai giraffe yesterday. This morning, staff and volunteers gathered together for a beautiful smudging ceremony at the Giraffe Habitat which was led by our Indigenous Relations team while Amani and her mother Mstari looked on from their outdoor yard. Amani, Mstari and Kiko, the three remaining giraffes are doing very well and do not appear to be impacted by his loss.

We do want to share that we received the preliminary pathology report this afternoon following the necropsy that was performed on Matu this morning. Your Toronto Zoo thanks the Pathobiology Department at the Ontario Veterinary College for their invaluable assistance in this case. The most significant preliminary finding was that of stomach content in Matu’s lungs – a finding that explains the respiratory, then cardiac arrest that occurred.

The regurgitation of material from the rumen (part of the stomach) is a well-recognized risk when animals that regurgitate their food (such as cows, sheep, deer, and giraffe – all referred to as ruminants) are anesthetized. This is why we took detailed precautions to minimize this risk by modifying Matu’s diet in the lead-up to this procedure. Fasting in the days leading up to being under anesthetic is a widely recognized and adopted practice for virtually all species. This is done to reduce the overall amount of stomach (ruminal) content and the fluid-nature of that content.

Despite these precautions and many others, and although we saw no evidence of ruminal content in his nose or mouth when he was routinely intubated (had a tube put into his lungs so we could ventilate him), we believe Matu regurgitated and inhaled ruminal content, which led to his death. Once he had this foreign material in his lungs, our efforts to revive Matu were never going to be successful.

We are grateful to the professional colleagues from whom we received advice in the preparation for this procedure, and the deep sympathy expressed by so many people since. Our first priorities are the well-being of the amazing animals in our care and ensuring the team completing the procedures is always safe. These are significant challenges particularly with a 480 kilogram animal. Any procedure with general anesthesia has risk, and this risk is even more significant in large species such as giraffes.

We want to express our deep gratitude to our community for sending so many supportive, compassionate and thoughtful messages. Our grieving team finds comfort in the love and support we have received and we also know the impact Matu had on our broader community as well as our Zoo family."
tl;dr: He choked to death on his own vomit while intubated. Here's a picture of the "smudging ceremony" they did for him.

smudging ceremony.jpg
 
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