Question

what is the meaning of long in the tooth? our dear spot is not a puppy anymore and is, in fact, long in the tooth. quite old not paying attention having fangs submit work it out not feeling ready yet? these can help:

Explanation:

The phrase "long in the tooth" is an idiom. Idioms are expressions with meanings that are not deducible from the literal definitions of the individual words. In this case, the context "not a puppy anymore" implies aging. "Long in the tooth" is commonly used to mean old (especially for animals, but also figuratively for people). "Not paying attention" and "having fangs" do not fit the context or the idiomatic meaning.

Answer:

quite old