You’ll probably get several different answers from us as well! And we’re not vets. But, these are some suggestions. (1) increase moisture intake (canned food, freeze dried/dehydrated foods (rehydrated), fresh/frozen raw foods, even kibble flooded with water) to help keep the bladder flushed out. (2) avoid feeding only dry food. (3) more frequent potty breaks. (4) cranberry/d-mannose supplement daily.
If she has alkaline urine, you can also add (1) small vitamin C capsule or a methionine (amino acid) capsule daily. (2) or a commercial pH reducing product (ex: Wysong Biotic pH-) or “grass saver” type product with methionine. Purchase pH test strips so you can monitor the urine pH.
I haven’t heard of fish being a problem regarding struvites.
