AITAH for not showing how sad and remorseful I am

I (M32) have a 1 year, 7-month-old Siberian Husky named Kota. Yesterday, I had to rush him to the emergency vet after he somehow ate some aluminum foil. Thankfully, the vet said the foil would pass and wasn't too concerning, but what was concerning to her was Kota’s weight. She told me he was underweight and needed to be fed more.

Backstory: when I was a kid, I had my first husky. The breeder gave me and my dad a full rundown of how to feed a husky from puppy to old age, and I’ve stuck to that method ever since, including with Kota. I explained this to the vet, and while she said she understood where I was coming from, she made it clear that it wasn’t enough and needed to be adjusted.

I immediately asked her for the best practices—feeding schedule, portions, etc.—so I could get Kota on a healthier plan going forward. I love my dog, he’s my forever pup, and I want him to live a long, happy life. I took the feedback seriously and left the clinic with a clear plan in place.

I called my wife (F30s) to let her know what happened. She was upset—understandably—because she and a few others had mentioned before that I should be feeding Kota more. She wasn’t wrong. I absolutely wish I had listened sooner.

When we got in the car, though, she started yelling at me—telling me I was a bad dog owner and didn’t deserve to have Kota at all. That hurt. I didn’t say anything, not because I didn’t agree (I do, in part), but because I was already beating myself up internally. I felt that silence was better than saying something reactive or emotional.

Apparently, that made her even more upset. She said I was being cold and that I wasn’t remorseful in the way she expected me to be.

So now I’m wondering—AITA for going quiet in the moment instead of responding the way she wanted?