I have two Bostons that have slept in their crates for 6 hours each
night in a large (11 x 10) walk in closet. It has become a routine
that when 12 pm gets here they automatically run to their crates and
get in. During the day they go in their crates for naps.
Recently, one of the Bostons began whining in the middle of the night
to be let out. Now when we try to get her in her crate she begins to
tremble and shake uncontrollably. My husband and I have torn the
closet apart looking for spiders, ants or anything that might have
scared her.
The only change has been that my 80 year old mother who is blind
recently moved in with us and now sleeps in the bedroom. After the
anxiety attacks we moved the crates to our bedroom but the Boston
still refuses to get in.

Anyone ever heard of a 13 year old dog suddenly getting crate anxiety?