Ok thats good fully consumable bones are safe and clean teeth great Theres a really good butcher here that sold me 20 lbs (whole..) of green tripe for 20 bucks They also have chicken backs for 80c/lb and whole rabbits. You're right, beef is usually a common allergy. I've found something strange with one of my cats though. She has allergies to ALL of the common meats when in kibble or canned. Like beef, turkey, chicken. She was good with rabbit, duck, and venison though. But when I switched her from a canned diet to completely raw she could eat beef, turkey, and chicken just fine! But in canned food, she would break out in these scabby rashes and one time had a bad reaction on her chin from touching the food and I had to drain the fluid that developed. Here she is eating a chicken breast with ribs (real cats eat MEAT!)
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Before you criticize someone walk a mile in their shoes. That way you'll be a mile from them, and you'll have their shoes.