If your dog exactly 22 lbs you can try to higher dose with your vet's permission. Also you can try some other product as you mention. Sometimes, some products work better on particular dogs or particular regions.

A prescription is not required to purchase our products, as they are over-the-counter items available where we are located as an international company. However, we strongly recommend consulting with your vet to determine the most suitable options for your pet's specific needs, health condition, and any potential allergies.

We advise consulting with your local vet, as they are able to advise what would be best for your pets needs.

There is a single chew which is effective for 3 months.

There is one tablet which is good for 3 months.