I don't think there is any realistic chance of any of the 3 indications at apartment being caused by non-human animal material.
However there is a good chance IMO that two of those indications may be caused by a minor human cut of a different date and nothing to do with the case.
In the lounge Eddie's indicated that in addition to the scent there was a physical source, and Keela confirmed this,and so did lab tests, so this location could easily result from a tiler's minor injury during installation of the tiles.
In the garden there were samples taken from the climbing plant for tests, as far as I know the lab results were inconclusive? but the assumption was they might be blood. Outside, rain would wash away the physical source. So here it may easliy be a historical cut experienced by a gardener pruning the plant.
In the bedroom Eddie indicated a scent only, with no physical source present, and the non-signal by Keela confirmed that.
So is it possible that of the 3 indications at the apartment, only the latter may be relevant?