Pensive Poppy. Miniature schnauzer with @UsAndTheDog on the Transpennine Express to Cleethorpes.
Orange on orange. Sausage dog seen by @tabsinthe on the Central Line, London Underground.
Stealth shot of a wee scruff. Border terrier seen by @jdcasasbuenas on the Northern Line, London Underground.
Baby or dog?! Seen by @sethtdog on the Santiago Metro in Chile.
Matilda is owning this carriage. Bulldog with @_TeamTilda_ on a @VirginTrains Pendolino train.
Snoozing Shetland Sheepdog seen by @llalpaca on the District Line, London Underground.
Bichon Frise spotted by @ameliabracken on a Midland train to London Moorgate.
In his very own travel bag, this chihuahua travels in style. With @lozengecapsule on a First Great Western train to Exeter.
Very excited to be on the tube, wee chap seen by @CarolyneLW on the Jubilee Line at Waterloo.
This Jack Russell is just showing off. Seen by @TheAleTrail on the Tyneside Metro.
Sitting pretty. Border terrier @teddybearbt on the Northern Line, London Underground.