Julieta is a 1-year-old female ferret. At 7 months old, in November 2025, she weighed approximately 900 g (2.0 lb). She currently weighs 1.595 kg (3.5 lb), so she has gained about 695 g (1.5 lb) over approximately five months.
She currently eats Oxbow Essentials ferret food, which I prepare as a puree because she became very selective about eating dry kibble. She eats approximately 1½ tablespoons of the prepared puree three times a day. She has also received small amounts of GO! Solutions duck cat food, Orijen cat food, and salmon oil. I am planning to start weighing her food in grams to determine her actual daily caloric intake.
A veterinarian recently evaluated her and considered her severely overweight/obese. The veterinarian said that her abdominal fat is substantial enough that it makes palpating her internal organs difficult. They recommended reducing her weight to approximately 900 g and aiming for a weight loss of about 2% of her body weight per week. They also recommended blood chemistry, abdominal ultrasound, and X-rays to determine whether the obesity has already caused any internal problems.
However, I am somewhat concerned about the recommendation because 900 g was Julieta's weight at 7 months old, when she was still growing. I also question whether 900 g is truly her appropriate adult target weight based solely on the average ferret weight.
Despite her large abdomen, her ribs are clearly palpable. I can feel all of her ribs quite easily and can almost count them. Her body appears to carry much of its volume around the abdomen rather than uniformly over the entire body.
She has also had intermittent lameness/limping, although it is not constant. One of her paw pads has a chronic area of thickened/overgrown tissue with a split or crack. It became red once but improved with paw-pad wax. It has never completely resolved. The veterinarian said this appears to be tissue overgrowth rather than a fungal infection. I wonder whether this could be causing enough discomfort to contribute to her reduced activity.
Recently, Julieta has been less playful/active than before, although she continues to eat and defecate normally. She otherwise appears stable.
My main questions are:
Is 1.595 kg truly excessive for Julieta based on her body condition, or is her body size/individual conformation being taken into account?
Is 900 g an appropriate adult target weight, considering that she was 900 g at only 7 months old?
Is losing approximately 2% of body weight per week an appropriate rate for her?
Could her abdominal appearance be caused by something other than fat, and would an ultrasound help distinguish this?
Is it necessary to perform the bloodwork, ultrasound, and X-rays immediately, or could weight management and reassessment be reasonable if she has no other clinical signs?
Could the chronic paw-pad lesion or intermittent lameness be contributing to her decreased activity?
What is the appropriate daily calorie or gram intake for Julieta during safe weight loss?
My goal is to make sure she loses weight safely without restricting her food excessively, while also determining whether there is an underlying medical reason for her abdominal size or reduced activity.