Hi mam..You could consider Salmon which is safe for your pet...It has omega 3 fatty acids which help keep your pets hair coat shiny and healthy ..It also has Vit A, D and B..Make sure to cook properly ( Raw or uncooked salmon is not recomended) Boneless filets are safer..You could also consider Herring, Flounder( rich in omega 3 fatty acids and Vit B), Cod fish, Lake white fish, Sardines or Mackerel ( avoid Spanish or King Mackerel) as they are large fish species which have high levels of mercury...
Some dogs have food allergies, so kindly be cautious when feeding fish to your pet for the first time..Offer it in small quantity initially...and watch out for signs of allergic reactions ( Diarrhoea, itchiness, vomiting...)..If your pet does not experience these signs..then you can continue giving fish...always make sure ti cook properly since it could have parasites or bacteria..