I've not seen anything like this from Fratteli Mazzega, IVR Mazzega, or AV Mazzega. However, that doesn't mean much. If it were from AV Mazzega it would have the AV. So that rules that out. (Besides, they do lamps and table vessels.) IVR Mazzega did do quite a few animals, so maybe. Or it could have been a later Mazzega. Is there a lot of wear on bottom? Could we see the signature?