Hartz® UltraGuard® Dual Action™ Topical Flea and Tick Prevention for Dogs and Puppies 31-60lb | Hartz
Beaphar® FIPROtec® Kill Flea Ticks Spot On Drop Treatment Protection for Small Medium Large XL Dogs Puppies (6 Treatments, Dog (Small 5-10kg)) : Amazon.co.uk: Pet Supplies
Reasons Why Your Dog's Flea Treatment Isn't Working and What to Do - PetHelpful