A needle aspiration and an x ray by a veterinarian would be needed to confirm the nature of the lump.
Due to the potential of, Baytril' to cause kidney and liver damage in elderly rodents, and to significant reduction of the level of good bacteria in the gut, upon which depends both digestion of food and the support of the immune system, of which approx. 80 % resides in the gut. You may want to ask your vet about trying Allegra or Quercetin, that is also anti-itch.
In the wild, tree squirrels consume soil (geophagy) which contains not only minerals, but also good digestive bacteria which doubles as a key part of the immune system, 80 % of which is comprised of the same healthy forms of bacteria residing in the gut. With squirrels cared for in captivity, especially those of an advanced age, whose health is compromised; you don't want to give them a wild source of soil based bacteria; as this likely will also contain some harmful parasite forms.
Adding a (SBO) soil-based probiotic with prebiotic with a broad complement of good bacteria forms, helps to refortify the good bacterial colony in the gut.
Veterinarian recommended, "Pet Flora" is a soil-based 'probiotic' (SBO) with likewise soil based 'prebiotic', which provides a broad based complement of healthy bacterial forms health professional explain lends towards a better balance than do sources with only a few soil based probiotics mixed with mostly dairy forms. Unlike most sources that lend to flavor and aroma for cats and dogs; this source has no flavorings or extraneous additives, making it on that account suitable to support tree squirrels for both maintenance and rebooting of the good gut flora. The website explains more about this under ingredients. .
For question, including whether this company ships to Italy, contact a representative at:
questions@vitalityscience.com (575) 758-3985)