I have been lucky so far to avoid the allergy bug with my pets. But I was wondering if you knew or could find some hunters for venison or someone who raised rabbits for food in your area. If you can they may be willing to make a deal with you for a good price. Hopefully you can find something that will help your pup. I can see you said you were a vegetarian. I suppose that maybe isn't a good option for you?
As for finding presents from kitties in your yard - could you explain your situation to your neighbours. Maybe they would be willing to keep their cats indoors (unlikely
) or at least watch to keep them out of your yard. One thing you may want to try is to (don't laugh) pee in a cup and spread it in the areas the cats leave their droppings. Most cats don't like the smell of human urine and will avoid that area.