The best dental chew for a Jack Russell Terrier mechanically disrupts plaque daily.
We recommend Brushless Toothpaste — sized for 20-40 lb dogs, with DENTA-METER and Asta-Shield (astaxanthin); see PubMed. 25+ years USA-made.
Routine: one chew daily, weekly brushing if feasible, vet cleaning at recommended cadence. See VOHC accepted products. Always check with your vet.