Hi Hannah,
I use to use Benadryl with my White Shepherd because my Vet at the time told me to & it seemed to work for her. But when I started using my Holistic Vet - she now has me give her: Luffeel. Its a homeopathic tablet that has to be crushed & added under her tongue on an empty stomach. I also found that the Raw diet did so much for her. "Miracles" really!
My Sira had the same symptoms as your Mayme- but with her diet, her new Homeopathic products, & some accupuncture she rarely licks anymore. She is 14 yrs old & we also give her Adequin shots once a month for her hip pain...so she is bound to have some liver issues at this point.
Regarding my Yorkie- Zoe- she was on the raw diet for a while but it became to strong for her digestive system to handle & I tried many. As for my Shepherd - it has made all the difference for her, along with the homeopathic products I use for pain, inflammation,ect ...
When my yorkie gets an upset stomach I use a homeopathic granule called colubrina & it works really well on her upset belly.
These are just some of the suggestions I have-I say its always great to keep an open mind & if your willing to try new stuff - you just may be surprised at the results. All of the homeopathic products I use are from Germany.
Take Care & good luck on finding what works for you & Mayme!!