Always use a corner or backstop where possible. Calves positioned into a corner do not require a strong head lock therefore are much more relaxed.
A low head position e.g. held at the knees, is dangerous as the liquid cannot flow down to the stomach. The fluid will flow back toward the airway entrance and flow into the airway. It is also a more dangerous position for passing the tube as you are passing the tube toward the airway.
When inserting the tube a natural, comfortable position is best for the calf. Do not turn the nose up as this makes it harder for the calf to swallow and creates a more direct line toward the delicate airway area.
Simplify the process by placing the bottle on the ground or a nearby ledge rather than holding all in one hand.
Resistance most likely means you have encountered the airway entrance as the structures protrude out into the throat area. Do not push through, use gentle hands and realign so the tube passes smoothly into the oesophagus.
Use your judgement as to which position is most comfortable and safe for your calf. A sitting calf must be sitting up and not lying flat. Standing allows easier handling for more energetic calves.
Another safe position is to sit the calf on its rear, similar to tipping a sheep to trim its hooves.
You can double check tube location by looking for tube movement in the oesophagus in the left groove of the neck.
Calves will move their head through feeding. The hand holding the mouthpiece should also hold the calf, this way you will move with the calfs movement and the mouthpiece will not be misplaced. Maintain some slack in the tube to avoid the tube being pulled out of position.
Do not remove the tube too quickly. Remove gently while the calf swallows to ensure liquid flows down the oesophagus.
Easy mistake! Clip on the handle end, not the mouth end, to keep your tuber handy and hygienic.
As the wise guy says; measure twice cut once. Note: when feeding it is a good idea to maintain a curve in the tube, this provides leeway for any calf movement to avoid pulling the tube out of position.
The finger hook extension on the black sleeve allows you to secure the tube in position rather than watch the tube throughout feeding.