Are they produced in shot shells. We need to get rid of feral dogs and cats,
No, and the only "less lethal" ammo I know of is made in 12 ga only.
I would not bother with less lethal for feral animals, it doesn't do anything to rid them. Stinging them with plastic pellets only teaches them to be more wary and run at the slightest disturbance. The critters will still return.
Standard shotshells of #4 lead shot or one of the heavier than lead loads would be my first choice for something smaller than a 12 ga. I would prefer a 22 mag or a rifle chambered for a pistol cartridge but a shotgun would do fine.
