Yes Belly bands can be used when a female is in heat.......with our Smokey they are used for both.......he wears them 24/7...........he is mommy's widdle leg cocker...........hicks his leg on everything..................so he wears them all the time........as for the OP........with chi's you have a different shape in that area.......so you will probably have to have the kind with elastic so it doesnt gap........also make sure they are pretty tight............good luck
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