vagabond, wander, straggle, err, isolated, roam, ramble, sporadic, divagate, digress, more...

stay, remain, continue

feral cat, stray dog, stray cat, stray horse, stray cow, stray goat, stray sheep, stray pig, stray chicken, more...

few, little, occasional, many, such, poor, old, fancy, fairy, single, rare

roaming at large,   dogcatcher's target,   feral dog,   feral animal,   wander away,   street bound dog,   wander to,   off the path,   dog with no digs,   wander off course