Firstly, lambs need a good start: ensure that they have had adequate colostrum- and ideally that should be ewes’ colostrum not a substitute- and are not scouring. Lambs should get 250-350ml colostrum in total within the first 24 hours after birth, aiming for the first feed(s) to be off the mother or another ewe that has surplus.
Pet (Cade) lambs do better if you train them onto an ad lib milk bar (you can get relatively inexpensive ones- see link below- or you could invest in a self-heating feeder bucket such as a Shepherdess feeder). This way they can feed little and often, and are less likely to gorge on milk. Clean the feeder out completely once a day and then keep it topped up between cleanings.
In Cade lambs, bloat is usually caused by milk getting into the rumen, so it’s really important to wean them abruptly off milk at five weeks old, when the rumen first starts to become active. I really can’t stress this enough!
I would recommend using lamb weaner pellets and offer them this from three weeks old so that when you stop the milk they are already used to pellets. Keep pellets available on an ad lib basis.
Offer clean fresh water at all times.
I would also recommend testing dung samples for coccidiosis at 4/5 weeks and treatment if necessary.
If your Cade lambs are destined for the butcher, they will finish faster if they are kept housed and on ad lib pellets until ready. If you are planning to keep them longer term, the transition from indoors and on pellets to outdoors and on grass needs to be carefully managed, starting with access to outdoor grazing for a short duration for the first few days, and building up the time on grass each day in a way that allows the rumen flora time to adapt to the change in diet, whilst continuing to offer pellets and shelter until they have acclimatised. Be aware that Cade lambs will have reduced resistance to parasites than lambs reared outdoors, and may need worming more frequently.