Immunovet UK recommends:  
Size                  Breed
125g                Toy/Small 
250g-500g      Medium
500g-1kg         Large
1kg                   Extra large

Cats – up to 2.5 kilos 1/4 gram …. 1/4 teaspoonful of powder once a day sprinkled on food.
 Cats – 2.5 kilos and over 1/2 gram …. 1/2 teaspoonful of powder once a day sprinkled on food.
 Dogs – up to 10 kilos 1 gram …. 1/2 teaspoonful of powder once a day sprinkled on food.
 Dogs – 10 to 20 kilos 2 grams …. 1 teaspoonful of powder once a day sprinkled on food.
 Dogs – 20 to 30 kilos 3 grams …. 1 and 1/2 teaspoonful of powder once a day sprinkled on food.
 Dogs – 30 to 40 kilos 4 grams …. 2 teaspoonful of powder once a day sprinkled on food.
 Dogs – 40 kilos and over 5 grams …. 2 and 1/2 teaspoonful of powder once a day sprinkle

If for any reason you are not totally satified with your purchase and it is un opened we will gladly give a refund less 15% restocking fee.