@lisalindsley1 Presuming it’s a reputable breeder, you should have health records, OFA, eyes and Fanconi? If it’s a reputable breeder then you may just be unlucky that the pup has a problem. Alternatively if it’s not a reputable breeder, then it may be a nutritional deficiency. I don’t remember reading a similar case but others might know. Your vet is the first line of info, maybe a main vet hospital like Cornell here in NY would help. Given 9 weeks old, Parvovirus or malnutrition would seem more likely other than something genetic, but I am not a vet.
Good luck and please let us know how it goes in case anyone else has something similar in the future.
https://dogtime.com/dog-health/56527-low-blood-albumin-dogs-symptoms-causes-treatments
Here are several possible causes for a drop in blood albumin levels in dogs:
Malnutrition
Malabsorption of nutrients
Heavy bleeding
Oozing sores on the skin
Severe burns
Protein losing enteropathy (cause by parasites, gastritis, colitis, and other conditions)
Parvovirus
Liver disease
Renal (kidney) disease
Pancreatitis
Peritonitis
Fluid in the abdomen
Lymphoma
Sepsis
Immune-mediated diseases
Fungal infection
Amyloidosis
Lymphangiectasia
Inflammatory bowel disease