partner-contact/animal_owner/views/animal.xml

<flectra>

    <!-- Animal Tree View -->
    <record id="view_animal_owner_tree" model="ir.ui.view">
        <field name="name">view.animal.owner.tree</field>
        <field name="model">animal</field>
        <field name="inherit_id" ref="animal.view_animal_tree" />
        <field name="arch" type="xml">
            <field name="color_id" position="after">
                <field name="partner_id" />
            </field>
        </field>
    </record>

    <!-- Animal Form View -->
    <record id="view_animal_owner_form" model="ir.ui.view">
        <field name="name">view.animal.owner.form</field>
        <field name="model">animal</field>
        <field name="inherit_id" ref="animal.view_animal_form" />
        <field name="arch" type="xml">
            <field name="species_id" position="after">
                <field name="partner_id" />
            </field>
        </field>
    </record>

    <!-- Animal Kanban View -->
    <record id="view_animal_owner_kanban" model="ir.ui.view">
        <field name="name">view.animal.owner.kanban</field>
        <field name="model">animal</field>
        <field name="inherit_id" ref="animal.view_animal_kanban" />
        <field name="arch" type="xml">
            <field name="name" position="after">
                <field name="partner_id" />
            </field>
            <xpath expr="//div[hasclass('oe_kanban_details')]/ul" position="inside">
                <li t-if="record.partner_id.raw_value"><field name="partner_id" /></li>
            </xpath>
        </field>
    </record>

    <!-- Animal Search View -->
    <record id="view_animal_owner_search" model="ir.ui.view">
        <field name="name">view.animal.owner.search</field>
        <field name="model">animal</field>
        <field name="inherit_id" ref="animal.view_animal_search" />
        <field name="arch" type="xml">
            <field name="name" position="after">
                <field name="partner_id" />
            </field>
            <filter name="gender" position="before">
                <filter
                    name="partner_id"
                    string="Owner"
                    domain=""
                    context="{'group_by': 'partner_id'}"
                />
            </filter>
        </field>
    </record>

</flectra>