![Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R](https://www.valleyvet.com/swatches/1204RX_L_vvs_000.jpg?v=080920211026)
Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R
![Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R](https://www.valleyvet.com/swatches/1203RX_L_vvs_000.jpg?v=041920221725)
Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R
![Sentinel Spectrum Chews for Dogs 25.1-50 lbs (11-22 kg) - Yellow 6 Chews | Discount Pet Medication USA Sentinel Spectrum Chews for Dogs 25.1-50 lbs (11-22 kg) - Yellow 6 Chews | Discount Pet Medication USA](https://cdn11.bigcommerce.com/s-itrx3/images/stencil/1280x1280/products/164/529/sentinel_spectrum_yellow_26_50lb_6_month__06843.1704527245.jpg?c=2)
Sentinel Spectrum Chews for Dogs 25.1-50 lbs (11-22 kg) - Yellow 6 Chews | Discount Pet Medication USA
![Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R Sentinel Spectrum Heartworm + Flea + Worms Merck - Safe.Pharmacy|Heartworm Prevention + Flea | Dog R](https://www.valleyvet.com/swatches/1205RX_L_vvs_000.jpg?v=080920211026)