"Healthy adults" refers to individuals who are physically and mentally well, without any significant medical conditions or diseases that may affect their overall well-being. Full definition
The dietary requirement for protein in healthy adult dogs is satisfied when the dog's metabolic need for amino acids and nitrogen is satisfied. (merckvetmanual.com)
For healthy adult dogs with simple acute diarrhea, your veterinarian may initially recommend a conservative approach rather than an in - depth diagnostic work - up. (brittonroadveterinaryclinic.com)
For healthy adult cats, I find that the largest litter box you can get is best. (cat-lovers-only.com)