Firefighter Phil McFarlane said watching the cat owners visit the cattery to see if their cat survived "has been difficult".
He added that they were working with the cattery owners to find how many cats were killed in the blaze.
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Contractors are using a road surface which cannot be laid when it's wet or cold - leading to fears the eight-week, £8m project will overrun.
Dry today with pleasantly warm sunny spells developing.