as long as you didn't come back with any fleas

would agree it looks like something from Davidsons 'hobnail suite' - trouble is that 'hobnail' was produed by other factories as well.
Davidson first Registered their version in August 1890, and it's always possible they may well have added this item during the following decades.
The original Board of Trade Registration No. for Davidson's hobnail is 153858, but mould Nos. may well have long since faded or been obliterated if this was pressed much later. The well known lion trademark - although not apparently used after about the end of the C19 - may well have continued for however long an early mould remained in use - which may well have been some few years (but probably not on this piece).
Sorry, none of this really helps - let's hope a Davidson collectors looks in - failing which you might ask Chris Stewart