Licking Windows and Cold Glass

Catching your cat industriously licking the window can look distinctly odd, but there are some very ordinary explanations behind this quirky habit. Most often, it comes down to water. Condensation on cold glass provides tiny beads of fresh, cool moisture, and many cats — who are notoriously fussy, light drinkers — find this far more tempting than the water sitting in their bowl.

Texture and temperature play a part too. The smooth, cold, faintly damp surface feels novel against a cat's tongue, and the traces of minerals or interesting smells left on the glass can add to the appeal. For some cats it is simply an enjoyable sensory experience, much like drinking from a dripping tap.

Usually it is entirely harmless. It can, however, be a gentle hint that your cat would appreciate better access to fresh water — a wide bowl, a pet fountain or a couple of glasses dotted around the home. Very persistent licking of glass and other non-food surfaces occasionally reflects pica or an underlying issue, so it is worth a mention to your vet if it becomes obsessive or is paired with increased thirst.