I have found using suet much better than using lard. Lard tends to melt too easily and make a mucky sticky mess.
When making fat balls I melt the suet, mix in the seed, dried fruit, dried meal worms or what ever I am using, and then let it set and turns out to be far more solid and the birds seem to prefer it.
When making fat balls I melt the suet, mix in the seed, dried fruit, dried meal worms or what ever I am using, and then let it set and turns out to be far more solid and the birds seem to prefer it.