There has been list compiled of top ten Doggy films. The Source of this is Times Online

1. Old Yeller, 1957. A Walt Disney classic about a poor 1860s Texas family and the dog who loved them. Be warned – it’s a weepy.
2. Best in Show, 2000. Five show dogs, their owners and handlers head for the Mayflower Kennel Club Dog Show in this hilarious mockumentary.
3. Lassie Come Home, 1943. The first in a series of adventures: Lassie is cast out by her destitute family, but won’t stay, even when her new owner’s granddaughter is Elizabeth Taylor.
4. Rin Tin Tin, 1954. Rin Tin Tin and descendants starred in 48 movies between 1922 to 1954. Top film moment came in the 1954 adventure Rin Tin Tin Hero of the West.
5. Legally Blonde 2, 2003. Legendary chihuahua Bruiser gets his own Bill in Congress after Reese Witherspoon discovers his mother is being used for cosmetic testing. Bruiser becomes a gay icon after coming out with a rottweiller named Leslie.