void stash_on_pet( const std::list<item> &items, monster &pet )
{
    units::volume remaining_volume = pet.inv.empty() ? 0_ml : pet.inv.front().get_storage();
    units::mass remaining_weight = pet.weight_capacity();

    for( const auto &it : pet.inv ) {
        remaining_volume -= it.volume();
        remaining_weight -= it.weight();
    }

    for( auto &it : items ) {
        pet.add_effect( effect_controlled, 5_turns );
        if( it.volume() > remaining_volume ) {
            add_msg( m_bad, _( "%1$s did not fit and fell to the %2$s." ),
                     it.display_name(), g->m.name( pet.pos() ) );
            g->m.add_item_or_charges( pet.pos(), it );
        } else if( it.weight() > remaining_weight ) {
            add_msg( m_bad, _( "%1$s is too heavy and fell to the %2$s." ),
                     it.display_name(), g->m.name( pet.pos() ) );
            g->m.add_item_or_charges( pet.pos(), it );
        } else {
            pet.add_item( it );
            remaining_volume -= it.volume();
            remaining_weight -= it.weight();
        }
    }
}