Can you see her ribs?
There is no big difference with the Medium breed adult...Eukanuba Wild Nature formulas
No,it's not a parasite problem. I give her every 3-4months Milbemax and i use garlic quit often as a natural treatment.If she is thin but still eating a lot it could be a parasite problem...has she had a fecal check recently?
I agree with that.As a rule, it's healthier for them to be too thin as opposed to too fat.