You should go see a dermatologist or your primary physician because it may be infected which is probably why the skin has redness along scabbing.
False parents could be the most perfect human beings in the entire world but its all up to the child who decides their own wrongs and rights.
The cycle is called Yo-Yo dieting.
Have your cats neutered or spayed.
Keep your cat's safe by keeping them inside.
Keep your cats' identity visible at all times.
Veterinary treatment should be provided on a regular basis...
Predation on birds and other wildlife by outdoor cats is a genuine and legitimate worry.