Since both of mine are rescues, there B-Days are guesses.

Sierra's is July 21, 2001 (because we got her on Jan 21, 2002 and they thought she was about 6 months old)
Buddy's is Dec 25, 2001 (because I got him on Dec 21 and they thought he was about 1 year old, and I made it Christmas Day...... just because he's my Baby Buddy, and I could!!)