A whole load of bull…or cow…
Both are very symbolic of fertility although the cow obviously brings mothering instincts into play as well.
The bull is very masculine and embodies the solar energy of the sun whereas the cow is feminine personified and signifies the energy of the moon, they make a nice balance.
The bull is also the symbol of the zodiac sign Taurus which is an earth sign and I think both the cow and the bull have earthy connections.
These are both all about being productive, starting new projects or feeling stubborn or even insecure.
Fertility, motherhood, sun and moon magic, stubbornness, insecurity, productive, earth magic, stability, aggression, defence, contentment and strength.