Male kittens are usually neutered at between 4 to 6 months of age. However, the AVMA has endorsed early age neutering of dogs and cats 8 to 16 weeks of age. You and your vet can decide what is the best time starting in a few weeks.
The use of incense was very common. It was employed for profane purposes as an antidote to the lassitude caused by very great heat, as perfumes are now used. Mention of its introduction into pagan worship is made by classical writers (cf. Ovid, Metamorph., VI, 14, Virgil, AEneid, I, 146).
Many designs use openwork to allow a flow of air. In many cultures, burning incense has spiritual and religious connotations, and this influences the design and decoration of the censer. Some types could also be used as pomanders, where the perfume diffuses slowly by evaporation rather than burning.