If it is mites, there are other less expensivetreatments available. I use Ivermectin horse worming pastewhich is very effective and inexpensive, as well. Most vetswould treat with Ivermectin liquid (less potent) subcutaneously for atotal of three treatments, three visits, and three payments.One tube of horse worming paste costs from $12.00 - $20.00 and shouldlast one rabbit for years.
Some people smother the mites with mineral, baby, or olive oil, all ofwhich are inexpensive, but messy. I would think less messythan Vaseline, though..
Any of the above methods could be used in a prophylacticmannerin order to eliminate mites as a cause of thecondition you describe. If after treatment, Lyla still hassymptoms, you would know that you're dealing with something else.
Ivermectin does take three consecutive treatments over in as many weeksin order to insure that all eggs hatched in the interim betweentreatments are eradicated as young mites. The chemical doesnot penetrate the egg shell casing, so the mite must ingest it afterhatching.
I am not sure if the other treatments have to be done in asimilar manner for the same reason. Whenever I used oiltreatment I did it for three consecutive times, but I cannot vouch thatis entirely necessary.
Buck