iHerp Australia Issue 12 | Page 59

food value is in the thigh section you may wish to only feed this piece. You may also wish to consider leaving the entire skin intact on the leg to add some roughage to the diet, but I find that this necessitates the use of a much smaller mouse, meaning the food value is probably reduced. It is important that there are no jagged pieces of bone at either end of the drumstick, as this could be injurious or fatal to the snake. Assist-feeding with fish is a similar process, but never use fish with spiny fin rays, as these can lodge in the snake’s oesophagus, again with potentially-fatal consequences. Also, long-term feeding with some oily fish can result in thiamine deficiency because of the presence of an enzyme, thiaminase, which breaks down this essential vitamin. The best way to avoid this is to feed fish for only as long as necessary until the snake will take pinkies or other food. an introduction to having the snake recognise substitute foods as something it can eat naturally. After about every three assist- or force-feeds try leaving a food item in the enclosure or offer it on tongs or forceps. Neonates will vary from only requiring one or two assist- or force-feeds to those frustrating individuals requiring dozens of interven- tions over many months. How often should you try to assist- or force-feed your neonates? This is a difficult question, and the answer depends upon the size of the meal and how cooperative the snake is. I opt for smallish meals every 5-7 days. Feeding too infrequently can lead to a reduction in condition and feeding or attempting to feed too frequently can stress the snake and delay voluntary feeding. A good rule of thumb is to wait until each meal passes through the animal before attempting another feed, however I do know some keepers who feed very small meals every 3-4 days ‘In general it is better to err on the side of small food items, as they are easier to manage and harder for the snake to reject.’ One of the difficulties in both assist-feeding and force-feeding can be getting the neonate snake to open its mouth. Some will aggressively attempt to bite the moment food gets near. Other species such as copperheads (Austrelaps spp.) and some Red- bellied Black Snakes (Pseudechis porphyriacus) may refuse to open their mouths. In such cases the mouth may be gently pried open with a clean surgical probe - some people have had also had success with thin credit cards. Force-feeding is merely an extension of assist- feeding whereby the food is pushed far enough down the throat to minimise the chance of rejection. I say minimise because some neonates may still be able to regurgitate their meal. A tell-tale sign that this is imminent is when the snake coils into an ‘S’ shape and moves its head sharply from side to side, followed by attempts to move backwards. Often under these circumstances there is little you can do but to try again on another day. Force-feeding can be made easier by lubricating the food item with a little water or beaten egg, and by feeding long items like fish or rodent tails - particularly the latter because they have rear-facing hairs that make regurgitation difficult. In general, it is better to err on the side of small food items, as they are easier to manage and harder for the snake to reject. Blunt probes and forceps with rounded tips are useful implements, but make sure they are clean and be very careful not to damage the snake’s oral mucosa or oesophagus. Force-feeding and assist-feeding should be seen as and this seems to work for them. Specialist feeding techniques. Two further techniques deserve mention. I have never used them myself, but they are included for the sake of completeness and because others have used them with great success. Oesophageal tube feeding. This involves injecting a semi-liquid, high-protein meal straight into the deep oesophagus or stomach via a solid, wide-gauge needle or soft plastic tube. Commercially-available ‘pinky pumps’ employ a version of this method and comprise a syringe-like tube that is filled with thawed pinky mice that are macerated on the way through the barrel of the device, then forced down a metal needle into the snake’s throat. Alternatively, syringes fitted with soft plastic tubing or ‘crop needles’ used for feeding young birds are readily available online or from specialist pet/vet suppliers. I remember as a keen young herpetologist in the 1970s reading an article about William Haast of the Miami Serpentarium who fed his adult King Cobras (Ophiophagus hannah) using an automotive grease gun and plastic tubing to deliver a meat mixture direct into their stomachs! Apparently this was the only method available for maintaining the species, which in the wild feeds largely on other snakes. Well known elapid keeper Shane Black is a strong advocate of tube feeding small elapids. He uses turkey mince supplemented with calcium powder