I believe the hot glass tail was was affixed over the top of the pontil mark, it in order to conceal it. This was originally done at the factory. The tail has not been broken or repaired. See the last few photographs. I have examined it with a jewelers loop.
The dog measures approximately 4 long 2-1/4 wide by 3-3/8 tall. The piece still retains its original foil label. This very rare label reads GENUINE VENETIAN GLASS ITALY F&B Co.From this short lived entity. This is important piece, in a fantastic and very desirable color, designed by Ercole Barovier with the unusual label still in place. It would make a great addition to any Italian glass collection.
The item "Rare Ferro Toso & Ercole Barovier Glass Bulldog Red Gold Foil Label Murano 1930s" is in sale since Thursday, January 16, 2020. This item is in the category "Pottery & Glass\Decorative Pottery & Glassware\Figurines". The seller is "steam455" and is located in Saint Paul, Minnesota. This item can be shipped to United States, Canada, United Kingdom, Denmark, Romania, Slovakia, Bulgaria, Czech republic, Finland, Hungary, Latvia, Lithuania, Malta, Estonia, Australia, Greece, Portugal, Cyprus, Slovenia, Japan, China, Sweden, South Korea, Indonesia, Taiwan, South africa, Thailand, Belgium, France, Hong Kong, Ireland, Netherlands, Poland, Spain, Italy, Germany, Austria, Bahamas, Israel, Mexico, New Zealand, Singapore, Switzerland, Norway, Saudi arabia, Ukraine, United arab emirates, Qatar, Kuwait, Bahrain, Croatia, Malaysia, Chile, Colombia, Panama, Jamaica, Barbados, Bangladesh, Bermuda, Brunei darussalam, Bolivia, Egypt, French guiana, Guernsey, Gibraltar, Guadeloupe, Iceland, Jersey, Jordan, Cambodia, Cayman islands, Liechtenstein, Sri lanka, Luxembourg, Monaco, Macao, Martinique, Maldives, Nicaragua, Oman, Pakistan, Paraguay, Reunion, Uruguay.