In case anyone is having trouble finding the pet as I did, I asked around a bit and, apparently, the Shadowlands level scaling messed up the loot tables of some mobs.
Check what drops from them after you kill them. If a mob is dropping linen or wool instead of windwool, the pet no longer drops from them. This makes Kor'kron Butchers the most reliable way to get these pets for the time being.
1400 pets
In case anyone is having trouble finding the pet as I did, I asked around a bit and, apparently, the Shadowlands level scaling messed up the loot tables of some mobs.
Check what drops from them after you kill them. If a mob is dropping linen or wool instead of windwool, the pet no longer drops from them. This makes Kor'kron Butchers the most reliable way to get these pets for the time being.