Your dog and cat need protection from the sun as well. Give yourself some peace of mind and know that your protecting your pet from the getting sunburn. 

PetScreen SPF23 is a clear liquid sunscreen agent for protection of susceptible animals against the sun.

PetScreen SPF23 contains four different sunscreen agents to give animals broad-spectrum protection from both UVA (the ultraviolet radiation which damages the skin with more long-term effects) & UVB (the ultraviolet radiation which causes sunburn) components of sunlight. The product has a Sun Protection Factor of 23, tested on human skin. This is adequate for protection of animals from the long-term effects of excessive exposure to the sun.

Apply liberally once daily  to areas most likely to get sunburn . If your dog or cat doesn't like sprays you can  spray Petscreen onto cotton wool and then apply to it to the areas in need of Petscreen